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  <meta name="Generator" content="EditPlus®">
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  <title>Document</title>
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<script>
	// 'how old are you'切割成单词
	var str = 'how Old are i  you|abc';
	// 大小写字母表示：[a-zA-Z]+
	console.log(str.match(/\b[a-zA-Z]+\b/g));
	//how   [a-zA-Z]+

</script>
